dev-python/qrcode: Use optfeature to point to optional deps

Gentoo-Bug: https://bugs.gentoo.org/show_bug.cgi?id=500742

Package-Manager: portage-2.2.23
Signed-off-by: Justin Lecher <jlec@gentoo.org>

dev-python/qrcode/qrcode-5.0.1.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2014 Gentoo Foundation
+# Copyright 1999-2015 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 # $Id$
 
@@ -6,7 +6,7 @@ EAPI=5
 
 PYTHON_COMPAT=( python{2_7,3_3,3_4} )
 
-inherit distutils-r1
+inherit distutils-r1 eutils
 
 DESCRIPTION="QR Code generator on top of PIL"
 HOMEPAGE="https://pypi.python.org/pypi/qrcode"
@@ -17,9 +17,6 @@ SLOT="0"
 KEYWORDS="~amd64 ~x86"
 IUSE="test"
 
-# optional deps:
-# - dev-python/lxml for svg backend
-# - virtual/pil for PIL backend
 RDEPEND="dev-python/six[${PYTHON_USEDEP}]"
 DEPEND="${RDEPEND}
 	dev-python/setuptools[${PYTHON_USEDEP}]
@@ -28,3 +25,8 @@ DEPEND="${RDEPEND}
 python_test() {
 	"${PYTHON}" -m unittest qrcode.tests || die "Testing failed with ${EPYTHON}"
 }
+
+pkg_postist() {
+	optfeature "svg backend" dev-python/lxml
+	optfeature "PIL backend" dev-python/pillow
+}